FYI
I have a project I recently converted to maven which has junit 4 tests.
I had added the artifact dependency junit-jupiter-api for some reason which is required for writing junit 5 tests.
I'm guessing because it had this dependency, eclipse automatically selected "junit 5 runner" when I right clicked in eclipse to select run as junit for junit 4 tests. This was showing an execution time on the junit tab but wasn't showing the test results.
If you want eclipse to use the junit 5 runner to run junit 3 or 4 tests, you can either edit the project build path and add the junit 5 library, or update maven dependencies to add artifact junit-vintage-engine, either works.
This had me confused for a bit because it wasn't showing results and wasn't giving any error message.

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